using System;
using System.Globalization;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Math.EC;

namespace Org.BouncyCastle.Crypto.Parameters
{
    public class ECPublicKeyParameters
		: ECKeyParameters
    {
        private readonly ECPoint q;

		public ECPublicKeyParameters(
			ECPoint				q,
			ECDomainParameters	parameters)
			: this("EC", q, parameters)
		{
		}

		[Obsolete("Use version with explicit 'algorithm' parameter")]
		public ECPublicKeyParameters(
			ECPoint				q,
			DerObjectIdentifier publicKeyParamSet)
			: base("ECGOST3410", false, publicKeyParamSet)
		{
			if (q == null)
				throw new ArgumentNullException("q");

			this.q = q;
		}

		public ECPublicKeyParameters(
			string				algorithm,
			ECPoint				q,
			ECDomainParameters	parameters)
			: base(algorithm, false, parameters)
        {
			if (q == null)
				throw new ArgumentNullException("q");

			this.q = q;
		}

		public ECPublicKeyParameters(
			string				algorithm,
			ECPoint				q,
			DerObjectIdentifier publicKeyParamSet)
			: base(algorithm, false, publicKeyParamSet)
        {
			if (q == null)
				throw new ArgumentNullException("q");

			this.q = q;
		}

		public ECPoint Q
        {
			get { return q; }
        }

		public override bool Equals(object obj)
        {
			if (obj == this)
				return true;

			ECPublicKeyParameters other = obj as ECPublicKeyParameters;

			if (other == null)
				return false;

			return Equals(other);
        }

		protected bool Equals(
			ECPublicKeyParameters other)
		{
			return q.Equals(other.q) && base.Equals(other);
		}

		public override int GetHashCode()
        {
            return q.GetHashCode() ^ base.GetHashCode();
        }
    }
}
